2861812 has 6 divisors (see below), whose sum is σ = 5008178. Its totient is φ = 1430904.

The previous prime is 2861809. The next prime is 2861849. The reversal of 2861812 is 2181682.

It can be written as a sum of positive squares in only one way, i.e., 2802276 + 59536 = 1674^2 + 244^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357723 + ... + 357730.

2^2861812 is an apocalyptic number.

It is an amenable number.

2861812 is a deficient number, since it is larger than the sum of its proper divisors (2146366).

2861812 is a wasteful number, since it uses less digits than its factorization.

2861812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715457 (or 715455 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 2861812 is about 1691.6890967314. The cubic root of 2861812 is about 141.9755958855.

The spelling of 2861812 in words is "two million, eight hundred sixty-one thousand, eight hundred twelve".